Congrats Hutz!!!

 Seppo from Järvenpää, Finland
www.hollowheads.net (just click the hole in the head to proceed)

Hey everyone we went on a cruise last night.  A buddy of ours puts on these cruises about twice a month and this went wild when he put it on face book.  We had about 300 cars last night, and my buddy rode with me so the old ford was right in front.  I figured a lot out last night driving around.  I need to pull alot of my acceleration enrichment fuel out.  If I smash the throttle down fast it goes super rich and can't recover.  That's what was happening in my dyno pulls.  This engine loves about 12.5:1afr and no richer.  If I would tip into the throttle and let the turbo start to spool then hammer it it was a monster.  I trashed a honda 2000, new GTO (I really hurt his feelings) and my buddies subaru.  It would spool up in second gear (E40D trans) and the truck would just slide around like it was on ice.  I found that compression is not going to be a problem.  That thing ran perfect all night, I abused it, drove it 30 miles home and there was not a drop underneath it this morning.  That was a huge victory to me!!  Plus my head is very swollen today because the old ford completely stole the show.  My hood was open the whole time with ooohs and awwws.  One thing a motor head loves to do is brag about himself, his knowledge and his TRUCK.  ESPESCIALLY WHEN IT HAS A Y IN IT!!! 

Indeed! That looks like about a 60ftlb improvement at 5000rpm. That's a lot. Once you get it dialed in, it will be a monster.


Lawrenceville, GA

Good progress! Pull out some video about cruising and the truck. Show us how it goes .

 Seppo from Järvenpää, Finland
www.hollowheads.net (just click the hole in the head to proceed)

I started that run at high rpms because we needed some more tuning at low rpm under high load.  We have tuned it in better since then and it made about 380 lb/ft at the wheels at about 5000 rpms.  We have a lot smoother power curve now I pulled out some fuel.  I found that my engine likes about 12.2:1 afr.  We initially tried to tune to 11-11.5:1 under full load and boost.  It is not happy there.  Pulled some fuel out and now it runs better.  Didn't do anymore pulls on the dyno because it's running great and we have a evening cruise this weekend and I didn't want to miss it because I wrecked something.  Will do some more tuning next week.

There is a more smaller acceleration pulse times with 8-point, but I dont think there is not so much differencies.



Fuel/air-mixture is really fast moving stuff on high RMP's, so injector place is not so important.


Hyvinkää, FI

Interesting... . Your torque curve really begins from 4500 rpm? Is there anything below that?

351 hp from rear wheel + about 15% more from the crankshaft. Not bad, but I think you have lots of more to come after you get everything working.

Our engine gave best torque at 2600 rpm 630 Nm at engine dyno with single turbo and 0.7 bar pressure. (465 ft pound/10.1 psi). 329 hp / 5000 rpm. Our single turbo just was too small and exhaust back pressure was about 1.07 bar / 15,5 psi . Not so good and that's partially why HP was so small.

 Seppo from Järvenpää, Finland
www.hollowheads.net (just click the hole in the head to proceed)

 We actually found a problem with my crank trigger setting in my software and seems to run better.  Still have some mid range tuning to do but I am really happy with the results.

I am going to buy some different heads to lower my compression ratio.  We can't get any timing into the engine.  If we advance the timing it will hardly run and if we retard it, it will backfire.  We calculated our compression @ about 11.5-12:1. I am running E85 but I under boost I don't think we can keep the combustion chamber under control. 

It looks pretty good until 3900 then something goes wacky. Have you tuned it well without the boost yet?


Lawrenceville, GA